1/ If a game was coded in 2008, it cannot see your 4K monitor. It sees a "huge screen" and crashes.
⚠️ Warning: Never download "720pfix.exe" from a random forum link. Always use config files or -windowed -res=720 in Steam launch options. 720pfix
Here is why old games need it:
(0:00-0:05) "Stuck in 480p? Your game needs the 720pfix." (0:05-0:15) "Open the game's properties in Steam. Type -w 1280 -h 720 in launch options. That is the manual 720pfix." (0:15-0:25) "If that fails, right-click the .exe > Properties > Compatibility > Change high DPI settings. Check 'Override high DPI scaling' and set it to 'Application'." (0:25-0:30) "Fix your pixels. Follow for more old-game hacks." 1/ If a game was coded in 2008,
Result? No crash + smooth scaling.